Sidebar vanished

Okay, I’ve been working on a website for a client, and She just asked me to have two separate sidebars, one for her blog and another for the rest of her site. So I went and created the second sidebar and updated the functions accordingly. The good news is that both sidebars show up on my widgets page, but the bad news is that neither sidebar appears on any of the web pages. there’s just a blank space where my sidebar is supposed to be.

here is the code for my functions:

<?php
if ( function_exists('register_sidebar') )
register_sidebar(array( 'name' => 'Main Sidebar',
'id' => 'main_only',
'before_widget' => '<li id="%1$s" class="widget %2$s">',
'after_widget' => '</li>',
'before_title' => '<h2 class="widgettitle">',
'after_title' => '</h2>', ));

if ( function_exists('register_sidebar') )
register_sidebar(array( 'name' => 'Blog Sidebar',
'id' => 'blog_only',
'before_widget' => '<li id="%1$s" class="widget %2$s">',
'after_widget' => '</li>',
'before_title' => '<h2 class="widgettitle">',
'after_title' => '</h2>', ));
?>

furthermore, here is the code for one of my sidebars.

<div id= "sidebar">
&nbsp<br>
<?php if ( !function_exists(‘dynamic_sidebar’) || !dynamic_sidebar(‘blog_only’) ) : ?>
<?php endif; ?>
&nbsp<br>
</div>

the actual site can be found at http://quanwilliams.com/freelance

the only code I have on the page templates regarding the sidebar is this:

<?php get_sidebar('sidebar-blog.php'); ?>

So what am I doing wrong? I’m kinda on a deadline so I really need to know the solution ASAP. Thanks!